Pressure is expressed as:

$\overline{){\mathbf{P}}{\mathbf{=}}\frac{\mathbf{F}}{\mathbf{A}}}$

The equation of continuity:

$\overline{){\mathbf{\rho}}{{\mathbf{A}}}_{{\mathbf{1}}}{{\mathbf{V}}}_{{\mathbf{1}}}{\mathbf{=}}{\mathbf{\rho}}{{\mathbf{A}}}_{{\mathbf{2}}}{{\mathbf{V}}}_{{\mathbf{2}}}}$

**a)**

Therefore, force F = PA

A hurricane wind blows across a 7.50 m x 11.2 m flat roof at a speed of 190 km/hr. The pressure difference between the inside and the outside of the roof is 1783 Pa.

a) How much force is exerted on the roof?

b) If the roof cannot withstand this much force, will it “blow in” or “blow out”?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Bernoulli's Equation concept. If you need more Bernoulli's Equation practice, you can also practice Bernoulli's Equation practice problems.